I've always found The Paper Chase to be particularly filthy sounding, and this song is actually about filth....

http://www.youtube.com/watch?v=3Lj9gDB9Mxo

EDIT: Ooops, just realised this was a thread about electronica XD Serves me right for not reading thoroughly!! Oh well, I'll keep this here as a non-embedded link in case anyone wants some filthy riffs and samples instead of filthy beats.

I don't know why this thread made me want to join, it's not a kind of music I'm actually very familiar with, but here're some good trackss I do know of:Prince Kong - Broken Boys: http://soundcloud.com/kongism/prince-kong-feat-lady-grew-broken-boysBong-Ra - Catholic High School Girls Are In Trouble: http://www.youtube.com/watch?v=Y5s2_3CBMzALadyscraper - Chunderchunk: http://www.youtube.com/watch?v=wXvV8N3sVHcEdan (feat. Mr. Lif) - Rapperfection: http://www.youtube.com/watch?v=w1wI8fcoATk